MuranoPL does not handle properly derived class without __init__ method.

[Alexander Saprykin]

MuranoPL engine doesn't parse correctly signature of __init__ method that is not defined in derived class.

In case of inheritance, when Base class has __init__ method, but Derived class does not have __init__ method, attempt to create Derived class instance fails with exception:

[TypeError]: __init__() takes exactly 2 arguments (1 given)

Example:

class Base(object):

    def __init__(self, this):
        self._owner = this.find_owner('io.murano.Environment')

class Derived(Base):
    pass

Workaround:

Define explicit method __init__ in derived class that calls parent's class __init__ method.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/335621

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/335621
Committed: https://git.openstack.org/cgit/openstack/murano/commit/?id=345117b533ba74a39948ab2df5a54620a71fff0a
Submitter: Jenkins
Branch: master

commit 345117b533ba74a39948ab2df5a54620a71fff0a
Author: Stan Lagun <email address hidden>
Date: Wed Jun 29 11:52:21 2016 -0700

    Improve __init__ detection

    __init__ method was not detected for Python classes registered into MuranoPL
    (for example, for Python MuranoPL plugins) in it was inherited rather than
    implemented in the class.

    Closes Bug: #1597457

    Change-Id: I6f3ae0f6786f807de556f09906856153559efa97

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/mitaka
Review: https://review.openstack.org/338915

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/338915
Committed: https://git.openstack.org/cgit/openstack/murano/commit/?id=b29afa891555d879d768564ec4fdb06cc7d2c3eb
Submitter: Jenkins
Branch: stable/mitaka

commit b29afa891555d879d768564ec4fdb06cc7d2c3eb
Author: Stan Lagun <email address hidden>
Date: Wed Jun 29 11:52:21 2016 -0700

    Improve __init__ detection

    __init__ method was not detected for Python classes registered into MuranoPL
    (for example, for Python MuranoPL plugins) in it was inherited rather than
    implemented in the class.

    Closes Bug: #1597457

    Change-Id: I6f3ae0f6786f807de556f09906856153559efa97
    (cherry picked from commit 345117b533ba74a39948ab2df5a54620a71fff0a)

[Davanum Srinivas (DIMS) (dims-v)]

This issue was fixed in the openstack/murano 3.0.0.0b2 development milestone.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/murano 2.0.2 release.